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However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver's remove function\nhas finished, which would result in a use-after-free.\n\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:04:22.228Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47357", "state": "PUBLISHED", "dateUpdated": "2024-11-04T12:04:22.228Z", "dateReserved": "2024-05-21T14:28:16.987Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:35:59.761Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: iphase: fix possible use-after-free in ia_module_exit()\n\nThis module's remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver's remove function\nhas finished, which would result in a use-after-free.\n\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: iphase: corrige posible use after free en ia_module_exit(). La ruta de eliminaci\u00f3n de este m\u00f3dulo llama a del_timer(). Sin embargo, esa funci\u00f3n no espera hasta que finalice el controlador del temporizador. Esto significa que es posible que el controlador del temporizador a\u00fan est\u00e9 ejecut\u00e1ndose despu\u00e9s de que haya finalizado la funci\u00f3n de eliminaci\u00f3n del controlador, lo que dar\u00eda como resultado un use after free. Para solucionarlo, llame a del_timer_sync(), lo que garantiza que el controlador del temporizador haya finalizado y no pueda reprogramarse."}], "id": "CVE-2021-47357", "lastModified": "2024-05-21T16:54:26.047", "metrics": {}, "published": "2024-05-21T15:15:22.000", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: atm: iphase: fix possible use-after-free in ia_module_exit()", "id": "2282393", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282393"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\natm: iphase: fix possible use-after-free in ia_module_exit()\nThis module's remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver's remove function\nhas finished, which would result in a use-after-free.\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself.", "A use-after-free flaw was found in the Linux kernel\u2019s ATM networking card driver in how a user unloads the driver's module. This flaw allows a local user to crash the system."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent module atm from being loaded. Please see https://access.redhat.com/solutions/41278 for information on blacklisting a kernel module to prevent it from loading automatically."}, "name": "CVE-2021-47357", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47357\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47357\nhttps://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47357-f13e@gregkh/T"], "statement": "The bug happens during module unloading. Therefore, only a privileged user can trigger the issue. This issue not actual for Red Hat Enterprise Linux, because related part of source codes disabled.", "threat_severity": "Moderate", "upstream_fix": "kernel 4.4.276, kernel 4.9.276, kernel 4.14.240, kernel 4.19.198, kernel 5.4.133, kernel 5.10.51, kernel 5.12.18, kernel 5.13.3, kernel 5.14"}